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Service and Troubleshooting
Single Stage Variable Speed Ultra-Low NOx Gas Furnaces and Accessories
Pride and workmanship go into every product to provide
our customers with quality products. It is possible, however,
that during its lifetime a product may require service.
Products should be serviced only by a qualified service
technician who is familiar with the safety procedures
required in the repair and who is equipped with the proper
tools, parts, testing instruments and the appropriate service
manual. REVIEW ALL SERVICE INFORMATION IN THE
APPROPRIATE SERVICE MANUAL BEFORE
BEGINNING REPAIRS.
Only personnel that have been trained to install, adjust,
service or repair(hereinafter, "service") the equipment
specified in this manual should service the equipment. The
manufacturer will not be responsible for any injury or
property damage arising from improper service or service
procedures. If you service this unit, you assume responsi-
bility for any injury or property damage which may re-
sult. In addition, in jurisdictions that require one or more
licenses to service the equipment specified in this manual,
only licensed personnel should servise the equipment.
Improper installation, adjustment, servicing or repair of
the equipment specified in this manual, or attempting to
install, adjust, service or repair the equipment specified in
this manual without proper training may result in product
damage, property damage, personal injury or death.
PROP 65 WARNING
FOR CALIFORNIA CONSUMERS
Cancer and Reproductive Harm -
www.P65Warnings.ca.gov
WARNING
WARNING
Copyright © 2020 Goodman Manufacturing Company, L.P.
*MVS96*U
IMPORTANT INFORMATION ............................................ 2
PRODUCT IDENTIFICATION ........................................... 4
SYSTEM OPERATION ...................................................... 6
SCHEDULED MAINTENANCE ....................................... 21
SERVICING ..................................................................... 24
CHECKING VOLTAGE .............................................. 25
CHECKING WIRING .................................................. 25
CHECKNG THERMOSTAT, WIRING ........................ 25
CIRCUIT ...................................................................... 25
CHECKING DUCT STATIC ........................................ 26
CHECKING TEMPERATURE RISE .......................... 26
CHECKING PRIMARY LIMIT CONTROL ................. 27
CHECKING AUXILIARY LIMIT CONTROL ............... 27
INDUCED DRAFT BLOWER MOTOR ...................... 28
CECKING GAS VALVE (REDUNDANT) ................... 28
CHECKING GAS PRESSURE .................................. 28
CHECKING HOT SURFACE IGNITER ..................... 30
CHECKING PRESSURE TRANSDUCER ................ 30
CHECKING FOR DELAYED IGNITION .................... 31
BOARDS ..................................................................... 31
CHECKING FLAME SENSOR ................................... 31
TROUBLESHOOTING CHART ....................................... 32
WIRING DIAGRAMS ....................................................... 39
0140M00517-A
TABLE OF CONTENTS
RS6612018r1
June 2020
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Summary of Contents for Goodman AMVS96U
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Page 1: Table Of Contents
CHECKING FLAME SENSOR ........31 damage, property damage, personal injury or death. TROUBLESHOOTING CHART ........32 WIRING DIAGRAMS ............39 PROP 65 WARNING FOR CALIFORNIA CONSUMERS WARNING Cancer and Reproductive Harm - www.P65Warnings.ca.gov 0140M00517-A RS6612018r1 June 2020 Copyright © 2020 Goodman Manufacturing Company, L.P. -
Page 2: Important Information
IMPORTANT INFORMATION IMPORTANT NOTICES FOR CONSUMERS AND SERVICERS RECOGNIZE SAFETY SYMBOLS, WORDS AND LABELS Pride and workmanship go into every product to provide our customers with quality products. It is possible, however, that during its lifetime a product may require service. Products should be serviced only by a qualified service technician who is familiar with the safety procedures required in the repair and who is equipped with the proper tools, parts, testing in-... - Page 3 IMPORTANT INFORMATION CO can cause serious illness including permanent brain damage or death. B10259-216 Advertencia especial para la instalación de calentadores ó manejadoras de aire en áreas cerradas como estacionamientos ó cuartos de servicio. Las emisiones de monóxido de carbono pueden circular a través del aparato cuando se opera en cualquier modo.
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Page 4: Product Identification
NOMENCLATURE PRODUCT IDENTIFICATION The model and manufacturing number are used for positive identification of component parts used in manufacturing. Please use these numbers when requesting service or parts information. - Page 5 115 volt silicon nitride igniter. Left or right gas entry. Line voltage EAC terminal Goodman® Brand 96% Ultra-Low NOx Gas Furnace, 1 stage gas valve. This furnace complies with the SCAQMD Rule 1111 14 ng/J NOx emission limit.. Up flow/Horizontal...
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Page 6: System Operation
O PREVENT PERSONAL INJURY OR DEATH DUE TO IMPROPER INSTALLATION, instructions. ADJUSTMENT, ALTERATION, SERVICE OR MAINTENANCE, REFER TO THIS MANUAL. OR ADDITIONAL ASSISTANCE OR INFORMATION, CONSULT A Goodman brand GMVS96*U and Amana brand AMVS96*U ® ® QUALIFIED INSTALLER, SERVICE AGENCY OR THE GAS SUPPLIER. - Page 7 SYSTEM OPERATION A copy of the National Fuel Gas Code (NFPA 54/ANSI Z223.1) WARNING can be obtained from any of the following: American National Standards Institute O NOT OPERATE THE FURNACE WITH THE RAIN CAP REMOVED AS 25 West 43 Street, 4 Floor RECIRUCLATION OF THE FLUE GASES MAY OCCUR.
- Page 8 SYSTEM OPERATION COMBUSTION AIR INTAKE PIPE OPTIONS: GAS SUPPLY AND PIPING The RF000142 coupling can be secured directly to the The furnace rating plate includes the approved furnace gas furnace intake coupling if condensation is occurring in the input rating. combustion air inlet pipe.
- Page 9 SYSTEM OPERATION measure and adjust manifold “outlet” pressure. The furnace GAS PIPING CHECKS should operate for a minimum of 15 minutes before taking Before placing unit in operation or after servicing, leak test a combustion sample. Combustion samples should be gas connections.
- Page 10 SYSTEM OPERATION 24 VOLT THERMOSTAT WIRING 6) System Testing: Download the CoolCloudHVAC phone application (see pages 31 and 32)and use it to test all NOTE: Low voltage connections can be made through either operations of both indoor and outdoor units. the right or left side panel.
- Page 11 SYSTEM OPERATION temporary heat pump lockout and run the heat pump source again. if it fails to do so, the strike count again. against the furnace will be reset and the furnace There are four adjustable items associated with Dual Fuel will remain the temporary primary heat source control.
- Page 12 SYSTEM OPERATION 3 Ton Models 1400 CFM • Profile A(1) provides only an OFF delay of one (1) minute at 100% of the cooling demand 4 Ton Models 1760 CFM 5 Ton Models 2200 CFM 100% CFM 100% CFM Cooling Demand 1 min Setup Furnace Airflow: adjust the Gas Heating Airflow •...
- Page 13 SYSTEM OPERATION Do not connect R & C between the indoor unit and the outdoor unit if there is already a transformer installed in the outdoor unit providing 24VAC to the outdoor control. In this case, just use 1 and 2 terminals for communcations OUTDOOR INDOOR BOARD TERMINAL...
- Page 14 SYSTEM OPERATION NOTE: Airflow will not go above the system Max CFM. If the The dehumidistat must operate on 24 VAC and utilize a switch tonnage value selected generates an airflow value above the which closes on humidity rise. Refer to the low voltage wiring Max CFM, the system will cap this value and not provide any diagrams for additional wiring details.
- Page 15 SYSTEM OPERATION 115 Volt Line Connection of Electronic Air CoolCloudHVAC Phone Application – General Information Examples of CoolCloudHVAC Phone Application Cleaner Screens WARNING NOTE: Actual screen may look different based on the HIGH VOLTAGE ! device being used. O AVOID PERSONAL INJURY OR DEATH DUE TO ELECTRICAL SHOCK DISCONNECT ELECTRICAL POWER BEFORE SERVICING OR CHANGING ANY ELECTRICAL...
- Page 16 SYSTEM OPERATION update. The user will be notified once the download power to the unit for diagnostic purposes Option 1 may is completed and installation begins. At this time the be a better method to connect. phone can be removed from the Bluetooth range if nec- At power-up, the furnace control will display the unit essary (Note: if the phone is out of range, the user will not know when the installation has completed or what...
- Page 17 SYSTEM OPERATION The Status Menu includes the following items; • The operation mode • Blower CFM (if blower is running) • Humidification/Dehumidification mode (if active) • Ventilator operation (if active) • any active fault codes Menu items will appear in rotation as follows: •...
- Page 18 SYSTEM OPERATION Alarm Display Gas Heat Stage Multiplier Menu (CFM) If an active alarm is present, the alarm code shall be report- This menu allows adjustment of the low fire CFM multiplier. ed in Status Menu starting with “E” and following with the The default CFM for low fire is 70% of high fire.
- Page 19 SYSTEM OPERATION • Furnace operates; integrated control module monitors • Use 45°elbows rather than 90° elbows when possible safety circuits continuously. • Must not sag or otherwise trap condensate • R and W thermostat contacts open, completing the call • Use longest radius fittings possible for heat.
- Page 20 SYSTEM OPERATION 5. The vent termination shall be located at least 3’ above any forced air inlet located within 10’; and at least 10’ from a combustion air intake of another appliance, except another direct vent furnace intake. 6. In Canada, the Canadian Fuel Gas Code takes precedence over the preceding termination instructions.
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Page 21: Scheduled Maintenance
SCHEDULED MAINTENANCE be cleaned (permanent) or replaced (disposable) every two WARNING months or as required. HIGH VOLTAGE Horizontal Unit Filter Removal ISCONNECT POWER BEFORE SERVICING OR Filters in horizontal installations are located in the central INSTALLING THIS UNIT. ULTIPLE POWER SOURCES MAY return register. - Page 22 SCHEDULED MAINTENANCE CLOCKING A GAS METER 1. Turn off all gas appliances in the home. 2. Turn on the furnace. Ensure the furnace is operating at a 100% firing rate on 2 stage and modulating furnace product. 3. Once heating cycle is at a steady state (typically 15 minutes of operation), use a stopwatch to time how long it takes the smallest unit of measure dial on the gas meter to make a full revolution.
- Page 23 SCHEDULED MAINTENANCE 5. Use this formula to verify the Cubic Feet per Hour (CFH) input determined in step 4 is correct: (3600 x Gas Meter Dial Size) / Time (seconds) = Cubic Feet per Hour (CFH) 3600 is used as there are 60 seconds in a minute and 60 minutes in an hour.
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Page 24: Servicing
SERVICING Component I.D. VENT PIPE CONNECTION COMBUSTION AIR CONNECTION PRESSURE SWITCHES BURNER ASSEMBLY GAS VALVE DRAFT INDUCER PRESSURE TRANSDUCER INTEGRATED CONTROL BOARD CONTROL TRANSFORMER... -
Page 25: Checking Voltage
SERVICING CHECKING VOLTAGE CHECKING THERMOSTAT, WIRING WARNING WARNING HIGH VOLTAGE ISCONNECT POWER BEFORE SERVICING. ISCONNECT POWER BEFORE SERVICING OR CHANGING ANY ELECTRICAL WIRING. ULTIPLE POWER 1. Remove the blower compartment door to gain access to SOURCES MAY BE PRESENT. AILURE TO DO SO MAY CAUSE the thermostat low voltage wires located at the furnace PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. -
Page 26: Checking Air Circulator Blower Motor
SERVICING CHECKING DUCT STATIC 1. Remove blower compartment door to gain access to the thermostat low voltage wires located at the furnace The maximum and minimum allowable external static integrated control module. pressures are found in the specification section. These tables 2. -
Page 27: Checking Primary Limit Control
SERVICING external static pressure. An incorrect temperature rise may result in condensing in or overheating of the heat exchanger. WARNING An airflow and temperature rise table is provided in the blower performance specification section. Determine and adjust HIGH VOLTAGE temperature rise as follows: ISCONNECT POWER BEFORE SERVICING OR CHANGING ANY ELECTRICAL WIRING. -
Page 28: Induced Draft Blower Motor
SERVICING desired speed. The windings of the induced draft motor will have equal resistance +/- 5%. Normal resistance readings WARNING at room temperature will range from 14-17 ohms. The volt- age supplied by the IFC to drive the induced draft blower HIGH VOLTAGE will vary from 15-110 volts A/C between any two windings. - Page 29 SERVICING The line pressure supplied to the gas valve must be within the If supply pressure differs from above, make necessary range specified below. The supply pressure can be measured adjustments to pressure regulator, gas piping size, etc., and/ at the gas valve inlet pressure tap or at a hose fitting installed or consult with local gas utility.
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Page 30: Checking Hot Surface Igniter
SERVICING 3. Turn ON the gas and electrical power supply and operate the furnace. WARNING 4. Measure gas manifold pressure with burners firing. Adjust manifold pressure using the table below. HIGH VOLTAGE ISCONNECT ELECTRICAL POWER AND SHUT OFF GAS SUPPLY Manifold Gas Pressure BEFORE SERVICING OR INSTALLING. -
Page 31: Checking For Delayed Ignition
SERVICING CHECKING FOR DELAYED IGNITION 5. After the ignitor warmup time, begin checking for 24 volts to the gas valve. Voltage will be present for seven seconds Delayed ignition is a delay in lighting a combustible mixture only if proof of flame has been established. of gas and air which has accumulated in the combustion chamber. -
Page 32: Troubleshooting Chart
TROUBLESHOOTING Menu Options Menu Description Display LED Display Menu Description Aux (condensate switch enabled) A Enable or disable inverter boost operation. (compressor speed may Gas Heat Airflow Trim (default = 0%) t increase when this feature is on) (inverter only) Boost mode will operate above this selected temperature. - Page 33 TROUBLESHOOTING Status Codes Display Description of System Status Compressor Cooling, Low Stage (non-communicating units) Compressor Cooling, High Stage (non-communicating units) Compressor Heat, Low Stage (non-communicating units) Compressor Heat, High Stage (non-communicating units) Compressor Cooling, Single-Stage (single stage non-comm. units) Compressor Cooling, Low Stage (communicating units) Compressor Cooling, High Stage (communicating units) Dehumidification Constant Fan...
- Page 34 TROUBLESHOOTING Symptom LED Status Fault Description Corrective Actions d Equipment lacks shared data Populate shared data set using memory card Normal operation None No 115 power to furnace or no 24 volt power to integrated control Furnace fails to operate module Restore high voltage power to furnace and integrated control module.
- Page 35 TROUBLESHOOTING Symptom LED Status Fault Description Corrective Actions Check filters for blockage, clean filters or remove obstruction Furnace operates at reduced performance or operates on Check ductwork for blockage, remove Airflow is lower than demanded low stage when high stage is obstruction and verify all registers are fully open expected Verify ductwork is appropriately sized for system,...
- Page 36 TROUBLESHOOTING Symptom LED Status Fault Description Corrective Actions Grounding fault Furnace fails to operate Verify neutral wire connection to furnace & 1 continuity to ground source Poor neutral connection Check for correct gas pressure 11 Furnace fails to operate Open roll out switch Check for correct burner alignment Check for and correct burner restriction d...
- Page 37 TROUBLESHOOTING Symptom LED Status Fault Description Corrective Actions Flame sensed with no call for heat Correct short at flame sensor or in flame sensor Induced draft blower and wiring circulator blower runs Short to ground in flame sense continuously circuit Check for lingering or lazy flame No furnace operation...
- Page 38 TROUBLESHOOTING Symptom LED Status Fault Description Corrective Actions Check filters and ductwork for blockage, clean filters or remove obstruction Aux limit switch open (blower Check circulator blower speed and performance, D Furnace fails to operate compartment) correct speed or replace blower motor if necessary Tighten or correct wiring connection Aux switch (condensate switch)
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Page 39: Wiring Diagrams
WIRING DIAGRAMS LEFT CENTER RIGHT GV (13) DATA AC BREAK OFF BREAK OFF TABS TABS 2 R C R C G W Y Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. - Page 40 GOODMAN BRAND ® AMANA BRAND ® is a registered trademark of Maytag Corporation or its related companies and is used under license. ® All rights reserved. Copyright © 2020 Goodman Manufacturing Company, L.P.
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